LTC2978 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC2978' PDF : 80 Pages View PDF
LTC2978
Typical Performance Characteristics
DAC Load Regulation (Sourcing)
2.698
2.696
85°C
2.694
2.692
25°C
2.690
2.688
2.686
2.684
2.682
2.680
–40°C
2.678
0 –0.25 –0.5 –0.75 –1 –1.25–1.50 1.75 –2
CURRENT (mA)
2978 G19
DAC Transient Response to 1LSB
DAC Code Change
DAC Load Regulation (Sinking)
0.1038
0.1036
0.1034
0.1032
85°C
25°C
0.1030
0.1028
–40°C
0.1026
0 0.25 0.5 0.75 1 1.25 1.5 1.75 2
CURRENT (mA)
2978 G20
DAC Soft Connect Transient
Response when Transitioning from
Hi-Z State to ON State
DAC Short-Circuit Current vs
Temperature
9.00
8.95
8.90
8.85
8.80
8.75
8.70
–50 –35 –20 –5 10 25 40 55 70 85 100
TEMPERATURE (°C)
2978 G21
DAC Soft Connect Transient
Response when Transitioning from
ON State to Hi-Z State
500µV/DIV
CODE ‘h1FF
CODE ‘h200
HI-Z
10mV/DIV
HI-Z
10mV/DIV
CONNECTED
CONNECTED
2µs/DIV
2978 G22
500µs/DIV
100k SERIES RESISTANCE ON
CODE: ‘h1FF
2978 G23
500µs/DIV
100k SERIES RESISTANCE ON
CODE: ‘h1FF
2978 G24
VDD33 Regulator Output Voltage
vs Temperature
3.275
3.270
3.265
3.260
3.255
3.250
3.245
3.240
3.235
–50 –35 –20 –5 10 25 40 55 70 85 100
TEMPERATURE (°C)
2978 G25
VDD33 Regulator Line Regulation
400
300
85°C
200
25°C
100
–40°C
0
–100
–200
–300
–400
–500
4.5 6 7.5 9 10.5 12 13.5 15
VPWR (V)
2978 G26
VDD33 Regulator Short-Circuit
Current vs Temperature
–86
–88
–90
–92
–94
–96
–98
–100
–102
–50 –35 –20 –5 10 25 40 55 70 85 100
TEMPERATURE (°C)
2978 G27
12
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